Milling cutter



May'28, 192-9. J. M. REDINGER MILLING CUTTEB Filed March 11, 1927 w.

1 formed on a chuck sleeve 7 The head 1 is osnrrr 1M- REDINGER, or IBOVIDE NCE,RHODEfISLAND; I v

MILLING Applicatio'n filed March 11,

This invention relates .to certain new and useful improvements in milling cutters, and relates more particularly to improved means. for holding the cutter. p 1

The primary object of-the invention is to provide a cutter, and especially one of the double-ended type, which enables either, end to be employedby the use of simple and positive holding means, the holding means functioning identically regardless of which end of the cutter is being'employed. I

' A further object of the invention is to pro vide means of this type which is of economical construction and which permits the cutter to-be easily and quickly applied to and removed from the holder or chuck.

In the drawings: h

Fig. 1 is a View partly in longitudinal section and side elevation of the invention;

Fig. 2 is a' front end elevation of Fig. 1;

Fig. Sis a side elevation of the cutter per se, and I Fig. 4 is an end view of Fig. 3. V

v In proceeding in accordance with the present invention, a holder isemployed having the usual shank 1, which latter at its outer end is 1 formed with a head 2 longitudinally slotted at 3 to provide a series of resilient jaws or members 4 having tapered outer faces 5 which are-engaged by a continuous conical wall 6 threaded at 8 and sleeve 7 is correspondingly. thread-ed so as to engagewith'the threads 8.v The sleeve 7 is formed with a series of cutouts 9 so as to enable the latter to be gripped by a wrench and rotated. The cutter is composed of a shank 10 havinga central portion 11 of uniform diameter throughout, the portion llbeing formed with a longitudinal or axial cut-out or groove 12 which formsa keyway. The keyway extends through the ends of the central portion 11 as shownin Figs. 1 and 2. One of the members-4 of the chuck is formed with a groove -13'which extends through its outer end and which terminates intermediate the ends of the member 4: toprovide a shoulder 14, a pin-15 preferably of circular crosssection being received inthe groove 13 and also in the groove 12 of the cutter and abuts the shoulder 14. It will be noted that the opening 13 in which the pin 15 is received is of less width at its inner portion than at its greater diameter, so that when the pin 15"is inserted in the opening 13, the pin cannot CUTTER.

1927. Serial no. 174,672.

drop out of the-opening, but can only be removed'by longitudinally sliding the-same through the front end of theopening; 13.

Cutters 16 and 17 which may be'of identical or varying form are provided on the opposite ends of the shank 10 and one of the same is received in an opening 17 providedtherefor in the shank L 1 From the foregoing, it willbe seen that in I ping sleeve 7- forwardly. The cutter is then inserted in positionand its groove 12 brought into register with'the pin, whereupon the out Y ter is slid into the position shown in Fig.1.

. The gripping sleeve 7 is then rotated rearwardly and due to the tapering faces 5 and. 6,

' the jaws 4; will be'mo ved inwardly to firmly engage the pin 15 in groove 12, thus positively rotation of the cutters withrespect to the 5 'head,or in other words, positively locking the and securely locking the parts so asto prevent parts sothat the cutter iscompelled to rotate A I with the headj 1 V Y In removing the parts, the reversed operation is had, namely the sleeve 7'ismoved forwardly to permit the jaws to expand where uponthe cutter is slid outwardly. Due to the Y inner end of the pin 15 projecting into the s5 bore 18 of the head. which receives the central portion 11 of the cutter, it will be seen that a j hook can be inserted in thebore 18 and en gaged with theinner end of thepin' 15 so as to remove the latter,-should the same stick in I the opening 13.,

. Having thus described my invention what desire to'secure by Letters- I claim as newand Patent is Y j Y In combination termediate enlarged part and having a longiwith a cutter having an intudinal groove in its periphery' extending";

through the ends of the enlarged part, a holder having a bore to receive an end of the cutter and having jaws engageable with the enlarged part, one .of the jaws being formed with a longitudinal groove whichjextends through the outer end thereof andwhich communicates with the first named groove and which has an inner end wall, a pin in the secend-groove abutting said end wall thereof at] one end-and having its opposite end flush with the outer end of said jaw and receivable inthe first groove, and means to move the 7 ja ws thereby to hold the pin in the first be removed solely by longitudinal sliding V groove, the second groove being of less Width thereof. I r

I at the side thereof whichrcornmunicates with lnjtestimony whereof I have hereunto set- 10 .the'first nam'ed 'groo've than the diameter of my hand and signed'rny name to this specifithe pin so as to cause'the pin to project into oatlon. I

the holder bore and to prevent lateral move ment of the pin and to enable the pin to d I 'JOSEPH 

